Core Network Engineer
airalo · Spain ·
- Work mode
- Remote
- Employment
- Contract
- Category
- Network engineering
- Experience
- 3+ years
- Company size
- 201-500
- Salary
- GBP 59,600 – 85,600 / year
Design and run Airalo's telecom core network: the multi-site IP infrastructure, GRX/IPX interconnects, and direct/sponsored roaming links that let eSIM travelers reach mobile partner networks in 200+ countries. Day to day this means configuring core elements (GGSN/PGW, DRAs, GTP, SBC, firewalls, routers) and debugging signalling and user-plane traffic.
Help Us Build The Future of Travel
At Airalo, we're making it easier for people to stay connected wherever they travel. As the world's first eSIM store, we help millions of travelers access affordable mobile data in 200+ countries and regions around the world.
Today, we're a team of 400+ people across 60+ countries, building a product used by travelers every day. We've grown quickly, but we've worked hard to keep what matters: trust, ownership, and the freedom for people to do great work without unnecessary layers or bureaucracy.
We're fully remote by design, genuinely global, and united by a shared mission to make travel simpler for everyone.
Your Next Destination
- Location: Remote.
- Contract: Full-time, permanent.
- Benefits: Learn more about our benefits here in this link -
- Languages: English is our main working language day to day, so you'll need to be comfortable communicating in it both in meetings and async.
Your main responsibilities will be:
- Designing the IP infrastructure of our multi-site data centers
- Designing the GRX/IPX interconnectivity and global PoP structure to access mobile partner networks
- Defining the WAN network strategy
- Leading and realization of the data centre LAN and WAN networks, specifically the configuration of DRAs, GTPs, GGSN/PGW, SBC, FW, Routers
- Integrating direct roaming agreements and sponsored roaming agreements
- Tracing of signalling and user plane transport for debug issues
- Acting as a primary interface between the Core Network team and Airalo’s Platform team, Airalo’s Network Operations team and technology partners (vendors, roaming partners)
- Core network optimisation and enhancement
- Supports the operations team in regards to:
- Deployments and rollouts
- Performance improvements
- Perform trainings
- Supporting the partner’s operations team
What You'll Bring
- Technical Degree in Engineering or Telecommunications preferred or equivalent experience demonstrated
- 3 - 5 years minimum relevant experience in the telecom core field
- 3+ years experience with network elements such as: Packet Gateway GGSN/PGW/DPI, direct and sponsored roaming (HLR/HSS), diameter routing and GTP, GRX
- 3+ years experience with these protocols; Sigtran: MAP (Mobile Application Protocol), Sigtran: CAP (Camel 1-3), Diameter (Ro, Gx, Gy, Gn, Gi), REST API, BGP
- Excellent verbal and written communication skills
Bonus Points
- IREG Testing experience is preferred
- International working experience is ideal
Why People Join Us
We started Airalo to make staying connected effortless, wherever you are in the world. Today, millions of travelers rely on our eSIMs, and many of the people building the product were customers first.
Our team spans 60+ countries, united by a shared belief that great work happens when people are trusted to own what they do. There's trust to own what you do, space to focus without constant layers of process, and a clear sense of what you're responsible for from day one.
As Airalo continues to grow, so do the opportunities to learn, take on new challenges, and make a real impact - from anywhere in the world.